Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Kotaro Sekimura"'
Autor:
Kotaro Sekimura, Yoko Matsushima, Hiroshi Koike, Chieko Nagano, Souichi Yoshikawa, Maki Kanda, Yumi Ohba, Kenji Otsuka, Hiroshi Hayashi, Tsuneo Hashimoto, Takeo Sasamoto, Momoka Hayashi, Takayuki Nakajima
Publikováno v:
Food Additives & Contaminants: Part B. 14:66-73
Residual antibacterial agents in 5909 animal and fishery products in Tokyo, Japan, were investigated over 17 consecutive years (2003-2019). Monitoring of 32 antibacterial agents (lincosamides, macrolides, penicillins, quinorones and tetracyclines) pe
Autor:
Yoko Matsushima, Hiroshi Koike, Yumi Ohba, Kenji Otsuka, Hiroshi Hayashi, Maki Kanda, Chieko Nagano, Souichi Yoshikawa, Tsuneo Hashimoto, Takeo Sasamoto, Momoka Hayashi, Kotaro Sekimura
Publikováno v:
Food Hygiene and Safety Science (Shokuhin Eiseigaku Zasshi). 61:109-118
The determination of antibacterial agents for animals in swine muscles was improved by microbiological screening and liquid chromatography-mass spectrometry (LC-MS/MS) analyses. In the first instance, the residual drugs were extracted from the sample
Autor:
Hiroshi Hayashi, Junichi Kamiie, Takeo Sasamoto, Yoko Matsushima, Yukiko Nakagawa, Kotaro Sekimura, Tetsuya Shindo, Maki Kanda, Tsuneo Hashimoto, Yumi Ohba, Hiroshi Koike, Kenji Otsuka, Akihiko Hirai, Chieko Nagano
Publikováno v:
Food Additives & Contaminants: Part A. 36:1098-1108
In this study, the staphylococcal enterotoxin type A (SEA) contaminant was quantified in cow milk by liquid chromatography-tandem mass spectrometry (LC-MS/MS) with the use of a stable isotope-labelled peptide of SEA as an internal standard. SEA was c
Autor:
Kotaro Sekimura, Tsuneo Hashimoto, Chieko Nagano, Maki Kanda, Takeo Sasamoto, Hiroshi Hayashi, Yumi Ohba, Kenji Otsuka, Yukiko Nakagawa, Takayuki Nakajima, Hiroshi Koike, Youko Matsushima
Publikováno v:
Food Additives & Contaminants: Part A. 35:2375-2386
We developed a method for the simultaneous determination of acaricides in comb honey using LC/MS/MS. Because methods for honey analysis had not previously been applied to comb honey, we modified three techniques for sample preparation and LC/MS/MS co
Autor:
Kotaro Sekimura, Yumi Ohba, Kenji Otsuka, Hiroshi Koike, Takeo Sasamoto, Junichi Kamiie, Momoka Hayashi, Yoko Matsushima, Hairoshi Hayashi, Tsuneo Hashimoto, Chieko Nagano, Souichi Yoshikawa, Maki Kanda
Publikováno v:
Food additivescontaminants. Part A, Chemistry, analysis, control, exposurerisk assessment. 37(8)
In this study, we developed a reference labelled protein containing the partial amino acid sequence of botulinum neurotoxin type A (BoNTA). We also applied it as an internal standard to detect specific and non-toxic peptides originated from BoNTA in
Autor:
Yoko Matsushima, Tsuneo Hashimoto, Kotaro Sekimura, Yumi Ohba, Chieko Nagano, Kenji Otsuka, Yukiko Nakagawa, Maki Kanda, Hiroshi Hayashi, Hiroshi Koike, Takeo Sasamoto
Publikováno v:
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan. 60(3)
We developed an analytical method for determining 15 antifungal drugs, 2 antiparasitic drugs, and 3 veterinary drugs in fish and livestock products using LC-MS/MS. First, 50% ethanol was added to their products, and the mixture was homogenized to red
Autor:
Akihiko Hirai, Yoko Matsushima, Hiroshi Koike, Kotaro Sekimura, Chieko Nagano, Tetsuya Shindo, Maki Kanda, Hiroshi Hayashi, Yukiko Nakagawa, Takeo Sasamoto, Tsuneo Hashimoto, Yumi Ohba, Junichi Kamiie
Publikováno v:
Food additivescontaminants. Part A, Chemistry, analysis, control, exposurerisk assessment. 35(12)
In this study, the presence of cereulide in cow's milk was identified and quantified using our validated method with liquid chromatography-tandem mass spectrometry. Cereulide was concentrated using protein acid-precipitation and extracted from the pr
Autor:
Yumi Ohba, Chieko Nagano, Hiroshi Hayashi, Maki Kanda, Hiroshi Koike, Yoko Matsushima, Kotaro Sekimura, Yukiko Nakagawa, Yuki Okutomi, Tsuneo Hashimoto
Publikováno v:
Shokuhin eiseigaku zasshi. Journal of the Food Hygienic Society of Japan. 59(5)
Cyromazine in livestock products was determined using a validated LC-MS/MS method. There are three key points in our methods. First, the extraction was performed with two solutions, methanol and pH 3.0 McIlvaine buffer. The process was optimized for
Autor:
Ichiro Takano, Marie Nagata, Yumi Tsuruoka, Chieko Nagano, Souichi Yoshikawa, Hiroshi Hayashi, Tetsuya Shindo, Maki Kanda, Hiroshi Koike, Yoko Matsushima, Kotaro Sekimura, Takayuki Nakajima, Tsuneo Hashimoto
Publikováno v:
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences. 1057
We developed a simultaneous determination method for 37 veterinary drugs in two chicken processed foods (deep-fried chicken and non-fried chicken cutlet) and muscle via liquid chromatography-mass spectrometry. The veterinary drugs belong to 7 differe